Incorporation of Iron Oxide Nanoparticles and Quantum Dots into Silica Microspheres | Zendy

Numpon Insin | Zendy; Joseph B. Tracy | Zendy; Hakho Lee | Zendy; John P. Zimmer | Zendy; R. M. Westervelt | Zendy; Moungi G. Bawendi | Zendy

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Incorporation of Iron Oxide Nanoparticles and Quantum Dots into Silica Microspheres

Author(s) -

Numpon Insin,

Joseph B. Tracy,

Hakho Lee,

John P. Zimmer,

R. M. Westervelt,

Moungi G. Bawendi

Publication year - 2008

Publication title -

acs nano

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.554

H-Index - 382

eISSN - 1936-086X

pISSN - 1936-0851

DOI - 10.1021/nn700344x

Subject(s) - maghemite , microsphere , quantum dot , materials science , fluorescence , nanoparticle , nanotechnology , iron oxide nanoparticles , iron oxide , magnetic nanoparticles , silicon dioxide , chemical engineering , composite material , optics , engineering , metallurgy , physics

We describe the synthesis of magnetic and fluorescent silica microspheres fabricated by incorporating maghemite (gamma-Fe2O3) nanoparticles (MPs) and CdSe/CdZnS core/shell quantum dots (QDs) into a silica shell around preformed silica microspheres. The resultant approximately 500 nm microspheres have a narrow size distribution and show uniform incorporation of QDs and MPs into the shell. We have demonstrated manipulation of these microspheres using an external magnetic field with real-time fluorescence microscopy imaging.

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